Quasi-periodic patterns contribute to functional connectivity in the brain.
Default mode network
Functional connectivity
Quasi-periodic patterns
Resting state
Task
Task positive network
Journal
NeuroImage
ISSN: 1095-9572
Titre abrégé: Neuroimage
Pays: United States
ID NLM: 9215515
Informations de publication
Date de publication:
01 05 2019
01 05 2019
Historique:
received:
14
05
2018
revised:
07
01
2019
accepted:
30
01
2019
pubmed:
13
2
2019
medline:
20
12
2019
entrez:
13
2
2019
Statut:
ppublish
Résumé
Functional connectivity is widely used to study the coordination of activity between brain regions over time. Functional connectivity in the default mode and task positive networks is particularly important for normal brain function. However, the processes that give rise to functional connectivity in the brain are not fully understood. It has been postulated that low-frequency neural activity plays a key role in establishing the functional architecture of the brain. Quasi-periodic patterns (QPPs) are a reliably observable form of low-frequency neural activity that involve the default mode and task positive networks. Here, QPPs from resting-state and working memory task-performing individuals were acquired. The spatiotemporal pattern, strength, and frequency of the QPPs between the two groups were compared and the contribution of QPPs to functional connectivity in the brain was measured. In task-performing individuals, the spatiotemporal pattern of the QPP changes, particularly in task-relevant regions, and the QPP tends to occur with greater strength and frequency. Differences in the QPPs between the two groups could partially account for the variance in functional connectivity between resting-state and task-performing individuals. The QPPs contribute strongly to connectivity in the default mode and task positive networks and to the strength of anti-correlation seen between the two networks. Many of the connections affected by QPPs are also disrupted during several neurological disorders. These findings contribute to understanding the dynamic neural processes that give rise to functional connectivity in the brain and how they may be disrupted during disease.
Identifiants
pubmed: 30753928
pii: S1053-8119(19)30082-5
doi: 10.1016/j.neuroimage.2019.01.076
pmc: PMC6440826
mid: NIHMS1522270
pii:
doi:
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
193-204Subventions
Organisme : NCATS NIH HHS
ID : TL1 TR002382
Pays : United States
Organisme : NINDS NIH HHS
ID : R01 NS078095
Pays : United States
Organisme : NIMH NIH HHS
ID : R01 MH111416
Pays : United States
Organisme : NIMH NIH HHS
ID : U54 MH091657
Pays : United States
Organisme : NCATS NIH HHS
ID : UL1 TR002378
Pays : United States
Informations de copyright
Copyright © 2019 Elsevier Inc. All rights reserved.
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